PROTEINS Prepared by: Nur Fatihah Binti Din 4UPM
Learning Outcomes/Objectives: <ul><li>State the elements in proteins. </li></ul><ul><li>State the various structure of pro...
Introduction <ul><li>Protein are large complex organic molecules which play diverse roles in living organisms. </li></ul><...
<ul><li>Amino acid + amino acid  dipeptide  +  water </li></ul><ul><li>Polypeptides  +  water  dipeptides or amino acids  ...
Examples <ul><li>Protein sources: egg, meat, milk, yoghurt and etc. </li></ul>
Protein Structures <ul><li>a) Primary structure </li></ul><ul><li>b) Secondary structure </li></ul><ul><li>- alpha-helix <...
a) Primary structure <ul><li>The linear sequence of amino acids in a polypeptide chain. </li></ul>
b) Secondary structure <ul><li>Alpha-helix </li></ul><ul><li>- Three dimensional arrangement of amino acids with the polyp...
c) Tertiary structure <ul><li>The overall three dimensional shape of a polypeptide chain. </li></ul>
d) Quaternary structure <ul><li>The combination of two or more tertiary polypeptides that makes up a protein. </li></ul>
 
Amino Acids <ul><li>There have two types of amino acids: </li></ul><ul><li>i)   essential amino acids </li></ul><ul><li>ii...
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4.3 proteins

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4.3 proteins

  1. 1. PROTEINS Prepared by: Nur Fatihah Binti Din 4UPM
  2. 2. Learning Outcomes/Objectives: <ul><li>State the elements in proteins. </li></ul><ul><li>State the various structure of proteins. </li></ul><ul><li>Explain the formation and breakdown of dipeptides and polypeptides. </li></ul><ul><li>Explain the meanings of essential amino acids and non essential amino acids. </li></ul>
  3. 3. Introduction <ul><li>Protein are large complex organic molecules which play diverse roles in living organisms. </li></ul><ul><li>Proteins made up of such elements as carbon, hydrogen, oxygen, nitrogen, sulphur and phosphorus. </li></ul>
  4. 4. <ul><li>Amino acid + amino acid dipeptide + water </li></ul><ul><li>Polypeptides + water dipeptides or amino acids </li></ul>condensation hydrolysis hydrolysis
  5. 5. Examples <ul><li>Protein sources: egg, meat, milk, yoghurt and etc. </li></ul>
  6. 6. Protein Structures <ul><li>a) Primary structure </li></ul><ul><li>b) Secondary structure </li></ul><ul><li>- alpha-helix </li></ul><ul><li>- beta-pleated sheets </li></ul><ul><li>c) Tertiary structure </li></ul><ul><li>d) Quaternary structure </li></ul>
  7. 7. a) Primary structure <ul><li>The linear sequence of amino acids in a polypeptide chain. </li></ul>
  8. 8. b) Secondary structure <ul><li>Alpha-helix </li></ul><ul><li>- Three dimensional arrangement of amino acids with the polypeptide chain in a cork screw shape. </li></ul><ul><li>Beta-pleated sheet </li></ul><ul><li>- Polypeptide chains are arranged side by side. </li></ul>
  9. 9. c) Tertiary structure <ul><li>The overall three dimensional shape of a polypeptide chain. </li></ul>
  10. 10. d) Quaternary structure <ul><li>The combination of two or more tertiary polypeptides that makes up a protein. </li></ul>
  11. 12. Amino Acids <ul><li>There have two types of amino acids: </li></ul><ul><li>i) essential amino acids </li></ul><ul><li>ii) non essential amino acids </li></ul><ul><li>Essential amino acids are amino acids that cannot be synthesized by the body. Example: Leucine </li></ul><ul><li>Non essential amino acids are amino acids that can be synthesized by the body. There are 11-non essential amino acids. Example: Alanine </li></ul>
  12. 13. Thank You
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